The range of interactivity within eLearning experiences is vast, shifting from passive consumption to active involvement. At the most basic level, learners might simply read static content – text, images, or pre-recorded videos – offering minimal feedback . Moving up the scale, we find opportunities

Walk into any busy kirana store, pharmacy or cafe in India today and watch the billing counter. The shops with short queues all have two machines in common: a 2D barcode scanner and a thermal receipt printer. Together they cost less than a smartphone, and they change how fast a counter moves. A 2D